My 3 wheeler will not start. When I turn the key the lights do not come on, and when I push the start button nothing happens. The battery is fully charged. It was running fine and starting on the first push of the start button. Any ideas??? Thanks

i could really use some help here. about three years ago i purchased a used racing sled from a guy looking to make a little bit of quick cash to pay for his heated floor in his garage. The sled was obviously tuned and was a little beat up. I tested it out and nearly flew right off when i squeezed the throttle. He told me that if i were to use it on the trails that i would have to put smaller jets in (300). so i did and i ran great that year. The next year i noticed that it wasn't peaking like it used to. it was idling at 4000 rpm and engaging at 5000. After it warmed up it idled at 2000. The engine wouldn't open up passed 7500. Then the clutch just quit on me. The clutch wasn't made for trail riding and cracked almost all the way around. i did some "shopping" at a local snowmobile show and got myself a deal on a ski-doo 600cc clutch. I didnt have much problem with that until this year. The sled will run amazing when i first start it and punch the throttle. it would open up to 9000 if id let it. but as soon as i let off the throttle and try it again, it just has a monotone hum and it wont rev over 7000 at all no matter how many times i try to open it up. Any advice? Could it be the clutch, all the parts inside the clutch are new and tuned. or could it be that it is running too lean or rich? or is it a coolant issue? thanks and if you arent a member but you think you know what is wrong, please email me @ [email]shane.xa@gmail.com[/email]